We help IT Professionals succeed at work.

Handling COM port under NT service

bandi081497
bandi081497 asked
on
211 Views
Last Modified: 2010-04-06
Hi All,

I've got a big problem. I wrote a service under WINNT which      
asks the SERIAL Port, and put the characters into a file.
The problem is, I don't know when is data in the input buffer. My program contains a loop which never ends and the CP usage is nearly 100%. As far as I know, the sender sends a signal which indicates that the data is valid. How can I mask it?
Is there any solution?

Thanks in advance

ANdrew
Comment
Watch Question

Commented:
Remove the loop, check out the "WaitCommEvent" function
in the Win32 Help/documentation.

You can have the OS "wake your progam" whenever something
interesting happens at the COMM port.
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.